Pneumatic tire.



No. 861,434. PATBNTED JULY so, 1907. T. J. GHATHAM a.; J. s'. HOLLIDAY.

PNBUMATIG TIRE. APPLIUATION FILED 113.16.1907.

lfr- In- UNiTED STATES ,prr-ENT essieu.l

THOMAS J. QHATHAM AND JAMES SpH'OLLIDAY, OF TURLOCK, CALIFORNIA;

PNEUMA'rIe 'amsn To all whom 'it may concern:

Be it' known that we, THoMasJ. CHATHAM and JAMES S. HoLLrDAY, citizens of the United States,

. plify the construction and operation of tiiesofthis chamcter and thereby render the same less expensive and more durable and convenient in use.

With the above and other objects in view, the vention consists in the novel construction, combination and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawings, in which Figure 1 isa cross sectional view througha wheel rim equipped with our improved pneumatic tire; Fig. 2 is a sectional view through the valve connection; Fig. 3 is a detail section taken on the plane indicated by the line 3-'3 in Fig. 2; and Fig. 4 is a perspective view of oneiof Ithe screw caps.

Referring to theidrawings by' numeral, l denotes awheel rim and 2 aqn outer tire tube or casing. These parts may be of any desired orni or construction and connected together in any suitable manner.

The numeral 3 denotes an inner tire constructed of elastic rubber and divided by a plurality'of radially extending annular partitions 4 into a plurality of inner tubes 5, 6, 7, 8l These inner tubes are non-coinrnunicativq and while they are preferably formed integral, they may be formed separate and independent. Any number of them may be provided and each one is capable of being expanded or inflated to lill the entire outer tube or casing 2. l

The numeral 9 denotes a valve plug through which extend a plurality of valve tubes 10. The plug 9 is preferably formed with an externally screw threaded inner end 11 which is screwed into a threaded opening 12 formed in the rim 1, and a screw threaded outer end 13 for the reception of a removable casing 14 which forms a chamberthat incloses the outer ends o the valve tubes 10. Upon the exterior oi the plug 9 intermediate its threaded ends is formed a. flange or enlargement 15 of hexagonal or other polygonal shape.

lfor the reception of a wrench or similar tool by means oiwhich the plug may be applied to or removed from the rim. The casing 14 is formed at its outer end Specification of Letters Patent. Applies@ and par 41e, 1907. sans No. 358.468.

Patented July 30, 19,07.

with a reducedvportion 16 which is externally screw. threaded, as shown at 17, for'the reception of a pump connection and also for a screw cap 18 which serves to close said end of the casing and prevent the entrance of dust, Water, and other foreign matter. Each of the tubes 10 has its inner end 19 projecting from the innerv lend of the plug 9 and suitably connected by a flexible tube 20 of rubber, or the like, to one of the inner tubes or compartments of the tire 3. The outer ends 21 of said tubes 10 project from the outer face of the plug and within them are arranged vcone shaped valve seats 22 for engagement by cone valves'23. jPhe seats 22l are formed in inwardly projecting annular flanges 24 provided in said tubes and said valves areretained normally upon their seats by coil springs 25 which surround outwardly projecting stems 26;upon said valves and are'con'find between the flanges 'orribs 24 and collars '27 secured 'upon the outer ends of the stems 26. Owing to the -constrnction and arrangement oi these valves, 'itwill be seen that the pressure withinthe tubes 10 will'assist the springs 25 in closing ,the valves 23, and that when a pump .is connected to "the nipple 1,6 and operated, air will be forcedinto ther-casing 14 and the pressurc'will openthe valves 23 so that the air can pass betwcenthe latter and their seats arid through .the tubes 10 and'20.to the inner tubes, 6, 7, 8. vThe projecting ends 21 of the tubes 10 are externally screw threaded, asat 28, `for the re ception of screw caps 29, as shown in Fig. 4. 'lhese caps 29 are onlyv applied to the tubes 10 when the inner tubos to which the latter are connected have been punctured,

The operatinof the invention will be readily understood from the foregoing description taken in connection with the drawings. It will' beseen that by removing th'e'vcap 18 and Vattaching a pump to the nipple 16, all oi the inner tubes 5, 6, 7,' 8, may be simultaneously filled. When the cap 18 is applied, the outer ends of the tubes 10 containing the valves. will be effectively protected from dirt, moisture, etc. Should one of the inner tubes 5, 6, 7, 8 become punctured it will collapse and the others may then be in-v iiated so that theA pressure in thc tire may b e maintained'at a desired point. When a puncture occurs, the casing 14 is removed and one oi the caps 29 applied -to,the tube 10 which communicates with the punctured inner tube of the tire, Wlen this has been done, the casing 14 is replaced anda pump isc'onnected to the nipple 16 and the other tubes inflated. The :npplieation oi the cap 29 .to the tube 10 prevents the air roin passing through said tube' and its inner tire tube undput thi-1 ughthe puncture, as will be readily understood.

Having thus described our invention what We claim I und desire to secure by Letters Patent is:-

.flhc combination with n `rim nnd'an outer tire tube or easing, of a plurality of inner tire tubes, a plug screwed [U ends of sain valve tubes, said casing being formed with a ,2 l l V361,434,

threaded pump c onnection or nipple, a screw cp'fr closylng the latter alud .screw caps toreppllcaton' to the pro jectlngV outer. ends ,of the valve tubes, suhtantiall'y as' shown and for the purpose set forth.

In testimony whereof nwe hereunto affix our signatures".

lin presence of two witnesses.

- THOMAS J. CHATHAM.

JAMES S. HOLLIDAY.

Witnesses: V

A. P. RISE,

Il. H. Mooim: 

